Research
Our Papers
Our engineers have spent decades advancing the science of environmental stress screening and shock/vibration testing, sharing that research to help the industry test smarter.
2018
Large Shaker Systems in a San Francisco Area Test Lab
Quanta Laboratories, Santa Clara, CA
A survey of the large shaker installations Quanta operates in the Bay Area and the classes of product each is suited to.
2010
Which Vibration/Shock System is best for HALT/HASS?
Dr. Hong-sun Liu et al., Quanta Laboratories, in collaboration with Huawei Technologies
Compares four vibration/shock testing methods to find which most reliably uncovers real product defects. The skewed-fixture approach, developed at Quanta, outperformed costlier alternatives in a study conducted jointly with Huawei Technologies.
2009
Comparison Testing of Shock Versus Vibration ESS System
Quanta Laboratories, Santa Clara, CA
Measures a repetitive shock screening system against a controlled vibration system on the same hardware, and reports which defects each method actually precipitates.
2009
How China's Largest Telecommunication Company Improved Screening
Quanta Laboratories, in collaboration with Huawei Technologies
A field account of moving a large telecommunications manufacturer onto a screening regime that finds manufacturing defects earlier, without lengthening the production cycle.
2005
A New Approach for Production Line ESS
Dr. Hong S. Liu, P.E., Ph.D. — President, Quanta Laboratories, Santa Clara, CA
Sets out the production line screening system behind Quanta's ESS patent, using accordion support structures to hold multiple boards while ramping quickly between temperature extremes, completing a screening cycle in roughly ten minutes.
1998
Improper Environmental Stress Screening, Part I
Dr. Hong S. Liu, P.E., Ph.D., Quanta Laboratories
Examines screening programmes that consume budget without improving reliability, and identifies the profile and fixture decisions that cause it.
1998
Improper Environmental Stress Screening, Part II
Dr. Hong S. Liu, P.E., Ph.D., Quanta Laboratories
Continues the analysis with corrective screening strategies and the evidence used to judge whether a screen is doing useful work.
1995
Rotational Shock and Vibration
Dr. Hong S. Liu, P.E., Ph.D. — President, Quanta Laboratories, Santa Clara, CA
Addresses a real disk-drive failure mode, read/write heads unlatching during shipping, by introducing a testing apparatus Dr. Liu developed to apply controlled rotational shock and vibration, a capability not available elsewhere at the time.
1994
Experimental Skewed ESS Fixture
Dr. Hong S. Liu, P.E., Ph.D., Quanta Laboratories
Introduces the skewed fixture that lets a single axis of excitation deliver energy across three axes, the basis of Quanta's later screening work.
1994
ESS Equipment: Search, Evaluation, Design, Experimentation
Dr. Hong S. Liu, P.E., Ph.D., Quanta Laboratories
Documents the search for suitable screening equipment, the evaluation criteria applied, and the experimental programme that followed when nothing available met them.